I recommend great Peta Pixel annual article as a guideline to determine professional photography rates.
"Professional Photography Rates
Student: $50-100 per hour / $25-100 per image. As with all types of photography, the student rate varies, depending on their photographic discipline, industry experience, and interaction with, or assisting, professionals. Some advanced students do – and should – command as much as professionals. With that said, the photography schools are cranking out a lot of newly pressed photographers and many are trying to earn some income and attempting to get their foot in the door.
Semi-Pro: $50–$150 per hour / $25-125 per image. These are photographers who have ambitions to join the ranks of the professional. They may have another job or income source to keep them afloat, but which they aim to leave behind. Sometimes their additional skills are compatible with their photography. Many compete with professional photographers for jobs, but are not quite ready to jump in with both feet.
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Professional: $75-$250 per hour / $75-$250 per image. We can argue that a professional is anyone who is paid at least once for his photography. For the purposes of categorization, a professional is someone who depends on photography to make living. More precisely, professionals who have a solid portfolio to represent their specialty.
Top Professional: $200-$500+ per hour / $250-$1,500 per image. Is there really a top professional? In any industry, there always will be an élite group. In the case of photographers, some of the top image makers command over $10,000 per day, or $1,500 per image."
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